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利用大型有限元软件ANSYS,对矩形沟埋式涵管垂直土压力进行数值模拟分析,研究了沟槽宽度与涵管变形对垂直土压力的影响。结果表明:在刚性地基条件下,沟槽宽度较小时,涵管土压力系数单调减小,沟槽宽度较大时,涵管土压力系数呈先增后减的变化趋势;涵顶变形有明显的减荷作用,涵顶变形越大,垂直土压力系数越小;管道刚度较小时,应力呈现中间小两边大的分布趋势,管道刚度较大时,应力呈现中间大两边小的分布趋势。
Using the large finite element software ANSYS, the vertical earth pressure of the rectangular buried culvert was numerically simulated and analyzed. The effects of the groove width and the deformation of the culvert on the vertical earth pressure were studied. The results show that under the condition of rigid foundation, when the groove width is small, the pressure coefficient of culvert soil decreases monotonically, and when the groove width is larger, the pressure coefficient of culvert soil first increases and then decreases; the deformation of culvert is obviously reduced When the pipe stiffness is small, the stress shows a large distribution trend in the middle and small sides, and when the pipe stiffness is large, the stress shows a small distribution trend in the middle and the big sides.